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(No Model.) 3 sheets-sheet 1.

J. REILLY.

STEAM GBNERATDR.

No. 592,937. Patented Nov. 2, 1897.

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J. REILLY.

STEAM GENERATOR. No. 592,937. Patented Nov. 2, 1897.

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(No Model.) E 3 Sheets-Sheet 3.

J. REILLY.

STEAM GENERATOR.

No. 592,937. Patented Nov. 2, 1897.

/NVENTOH @fd/ l I BY l UNITED STATES SATENT Erica.

JAMES REILLY, OF NEW YORK, N. Y.

STEAM-G EN ERATOR.

SPECIFICATION forming part of Letters Patent No. 592,937, dated November 2, 1897.

Application'led April 14, 1897. Serial No. 632,075. (No model.)

` To a/ZZ whom it may con/cern,.-

Be it known that I, JAMES REILLY, a citizen of the United States, residing at New York, in the county of New York and State of New York, have invented certain new and useful Improvements in Steam-Generators; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the letters of reference markedthereon, Which form a part of this specication.

The invention relates more particularly to improvements in that class of steam-generators which are designed for producing steam for warming buildings and similar purposes; and its object is to produce an efficient and durable heating apparatus capable of easy regulation and in which the heat and products of combustion from the furnace are utilized to the fullest degree and in a manner which results in great economy of fuel and in the uniform expansion and contraction of the shell and tubes of the boiler.

In the accompanying drawings I illustrate my invention embodied in a heating apparatus comprising a furnace having above the fire-box a substantial combustion-chamber, an additional vertical combustion-chamber at one side of the furnace and directly connected with the combustion-chamber thereof, and a vertical, boilerV located in said additional combustion -chamber and separated from the walls thereof, the parts being so arranged that the products of combustion from the furnace will encompass the exterior surfaces of the boiler and be compelled to descend along said surfacesand then' ascend through the boiler-tubes to the exit-pipe.

The invention will be fully understood from the detailed description hereinafter presented, reference being had to the accompanying drawings, in which- Figure lis afront elevation of a steamgenerator constructed in accordance with and embodying the invention. Fig. 2 is a central vertical longitudinal section of same, the section being on the dotted line 2 2 of Fig. 3; and Fig. 3 is a horizontal section of same on the dotted line 3 3 of Fig. 2.

In the drawings, A designates the furnace proper, which furnace comprises Ithe gratebars B, the ash-pit C below said bars, the fire-box D above said bars, and the vertical combustion-chamber E above the nre-box. The combustion-chamber E is entirely inclosed, except at one side, whereby means of the opening F said chamber is in full and direct communication with the auxiliary vertical combustion-chamber G, the latter extending from the ground door supporting the furnace to the roof H, covering said furnace and said combustion-chamber G. The combustion chamber G contains the vertical boiler I, whose shell is separated from the walls of said chamber and extends from a point about on a level with thegrate-bars B to a point above said roof H and adjacent to the exit-pipe J. The walls of the boiler I are entirely free below the roof H, but above said roof H the upper end of said boiler is inclosed by the asbestos or other casing K.

The lower portion of the combustion-chamber G adjacent to the {ire-box D is inclosed by the bridge-Wall L, Whose upper edge is about on a level with the upper edge of the fire-box D, as illustrated in Fig. 2, said Wall L extending downward to the ground floor supporting the furnace. The lower end of the boiler I is suitably supported upon legs IVI, and said boiler contains the series of vertical tubes N, Which are open at their upper and lower ends and are separate from one another in order that the water within the boiler I may freely contact with their surfaces.

The boiler I in itself is of usual construction and is furnished with the delivery-pipe O for steam which is to pass upward to the lsteam-radiators located in the various rooms of the dwelling or other building to be heated. The furnace proper, A, will be supplied with the door P, through which fuel may be introduced to the fire-box D, and below the gratebars B the furnace is supplied with the draftdoor Q. The ash-pit C is supplied with suitable doors R R.

The exit pipe J contains the damper S, mounted upon a pivoted'rod T. The doors P Q are hinged at their upper edges, and, as illustrated in Fig. 3, means are provided for the automatic operation of the doors P Q and damper S by pressure in the boiler I.

IOO

In Fig. l it will be observed that the rod T of the damper S is provided with the crankarm V, which is connected by a link W with one end of the pivoted lever X of the diaphragm pressure-regulator Y, the latter being in communication by means of the pipe a with the pipe Z), connected with the boiler I. The diaphragm-regulator Y is in itself of usual form and construction, the lever X being pivoted to the easing of said regulator and connected with the diaphragm-rod c. The lever X is provided with a weight cl of any suitable form,which creates a downward pressure upon the diaphragm-rod c. The right-hand end of the lever X is connected by a chain or other suitable connection e with an eye f, extending outward from the door P, and the lefthand end of the lever X, in addition to being connected with the link IV, is by means of a chain or other suitable connection g connected with an eye 7L, extending outward from the draft-door Q. The lever X of the pressureregulatorYis shown in its depressed position, and when said lever is in this position it will indicate that there is no excess of pressure in the boiler I, and at such time the door P will be in its closed position and the door Q and the damper S will be in their open position, as shown. Upon any excess of pressure in the boiler I the regulator Y will be acted upon thereby and cause the weighted end of the lever X to elevate and its opposite end to descend, the result of this being that through the pull on the chain e the door P will be opened to admit air to the upper part of the fire and that the left-hand end of the lever X by descending will slacken the chain g and permit the door Q to close and shut off the air from the lower part of the grate-bars and also pull downward on the link IV and crankarm Vto close or partially close the damper S.

The regulator Y is operated by the pressure from the boiler I, and this pressure is utilized through the medium of said regulator and the connections above referred to to automatically operate the doors P Q and damper S. Upon the lessening of the pressure in the boiler I the weight CZ will depress the righthand portion of the lever X, and this will have the effect of permitting the door P to close and opening the door Q and damper S, thus permitting fresh air to enter below the grate-bars and thus creating a strong draft through the pipe J, with the result of causing the fire to burn more briskly. As the pressure in the boiler I increases the door Q will gradually close, and the damper S will likewise gradually close, cutting off the draft and slowing down the flre. The drafts of the furnace are thus automatically regulated by the pressure in the boiler I.

The boiler may be provided with a suitable gage m and pressure-indicator n, if desired.

In the operation of the heating apparatus above described the iire will be started in the usual manner upon the grate'bars B, and the heated air, gases, and products of combustion,

after having been generated in the furnace proper, A, will freely pass through the opening F into the chamber G, where, the latter having no exit from its upper end, they will be compelled to pass around the exterior surfaces of the boiler I, and thence descend into the lower part of the chamber G and find their exit by passing upward through the boiler-tubes N to the pipe J. In accordance with this invention the products of combustion are thus retained in contact with the surfaces of the boiler and boiler-tubes until their entire efficiency has been utilized in heating the water within the boiler.

The opening Fis above the lower end of the boiler I, and hence the products of combustion passing through said opening are compelled to pass over the entire exterior surfaces of the boiler exposed within the chamber G before they can escape upward through the tubes N. In accordance with this invention the boiler-shell is exposed to the direct action of the heat, and this furnishes a material increased surface for heating the water within the boiler.

It has been demonstrated in the practical use of this invention that great economy in fuel is gained, since the entire efficiency of the heat is utilized over the exposed surface of the boiler shell and tubes, and that by reason of the construction presented the steam may be properly generated with a much smaller quantity of fuel than would be the case were the products of combustion permitted to ascend through the boiler-tubes without having passed over the exterior surface of the shell of the boiler.

In the construction of heating apparatus illustrated the heat acts with substantial uniformity over the shell and tubes of the boiler, and hence said shell and tubes expand and contract toabout the same degree and there is no danger of the joints in the boiler becoming broken or opened. The chamber Gis located at one side of the combustion-chamber E, and hence the gases and products of combustion are given an opportunity to become thoroughly combined and consumed before they reach the exit-pipe J.

The method of regulating the damper in the exit-pipe J and the drafts through the doors at the upper and lower parts of the firebed has been sufficiently explained hereinbefore.

The sheet-metal shells w, outlining the chamber G and chamber E, will preferably have an exterior covering or casing of asbestos, and within the shell w of the chamber G will be arranged the hre-brick lining y.

W'hat I claim as my invention, and desire to secure by Letters Patent, is-

l. The furnace having the fire-box, the combustion-chamber above said iire-box, and the door in the side of said chamber for the introduction of fuel to said fire-box, combined with the additional chamber opening at one side into said combustion-chamber and en- IOO IIO

tirely closed at its top and sides except at its` said side which opens into said combustionoharnber, the vertical boiler within and separated from the walls of said additional chainber, the distributing-pipe for steam leading from the upperend of said boiler, and the tubes in said boiler leading from the lower part of said additional chamber to the exitpipe, whereby the products of combustion from said combustion-chamber are compelled to pass entirely around and down the sides of said boiler` to said tubes; substantially as set forth.

2. The furnace having the fire-box, the oombustion-oharnber above said fire-box, and the with the additional Chamber opening at one side into said combustion-chamber and entirelyolosed at its top and sides except at its said side which opens into said combustion-chamber, and the vertical tubular boiler within said additional chamber and extending above the same to the exit-flue whereby a space is left within the upper end of the boiler above the water-line, and the distributing-pipe connected with the upper end of said boiler; substantially as set forth.

In testimony whereof I affix my signature in presence of two witnesses.

JAMES REILLY. Witnesses:

CHAs. C. GILL, E. Jos. BELKNAP. 

